September Weather in Monteriggioni, Italy

Last updated: March 24, 2025

September in Monteriggioni, Italy, offers a delightful blend of warm days and crisp nights. With maximum temperatures reaching 32°C (89°F) and an average of 20°C (69°F), visitors can bask in the late summer sun while experiencing cooler evenings as temperatures dip to a minimum of 7°C (45°F). However, be prepared for some rain, as the town sees about 91 mm (3.6 in) of precipitation over 9 days, contributing to a relatively high humidity level of 66%. This combination of warmth and moisture brings lush greenery, making it an enchanting time to explore the historical landscapes and charming streets of this beautiful Tuscan gem.

September Temperature in Monteriggioni

In September, Monteriggioni sees a delightful transition as summer begins to wane. With temperatures ranging from a minimum of 7°C (45°F) to a comfortable maximum of 32°C (89°F), the month offers a pleasant average of 20°C (69°F), making it an ideal time for outdoor activities. The warmth lingers from the peak of summer, yet the nights grow cooler, allowing for a refreshing breeze. This gradual cooling trend sets the stage for the upcoming autumn months, where temperatures steadily drop, but in September, visitors can still relish the sun's embrace while exploring the enchanting medieval streets of this picturesque Italian town.

September Weather in Monteriggioni: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Monteriggioni, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec414548546271757668595144
Data source: Temperature data for Monteriggioni generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Monteriggioni

In Monteriggioni, Italy, September marks a notable peak in precipitation, with 91 mm (3.6 in) of rain, mirroring the rainfall levels seen in May. This month experiences about 9 days of rain, indicating that while showers may be common, they are often interspersed with the lingering warmth of summer. As autumn approaches, September's rainfall serves as a transition, paving the way for the wetter months ahead, such as November, which records an increase to 141 mm (5.5 in) over the same number of precipitation days. This trend highlights a significant shift in the seasonal weather pattern, turning from the drier summer months, where rainfall dips as low as 36 mm (1.4 in) in August, to a more robust autumn climate.

September Precipitation Trends in Monteriggioni

The chart displays monthly precipitation patterns in Monteriggioni, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec51786681914341369188141111
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Monteriggioni

As summer gives way to autumn, September in Monteriggioni, Italy, experiences a noticeable increase in humidity, rising to 66%. This transition marks a shift from the drier summer months of July and August, which boast low humidity levels of 57% and 55%, respectively. The air begins to retain more moisture, leading to a refreshing but slightly more humid atmosphere. Following September, humidity levels climb further in October, hitting 79%, and maintain a high through the winter months. This pattern of rising humidity in autumn serves as a prelude to the wetter, cooler months ahead, reminding visitors that while the warm days may dwindle, the lushness of the Tuscan landscape remains vibrant and inviting.

September Average Humidity in Monteriggioni

This chart illustrates the average monthly humidity levels in Monteriggioni, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec84%76%68%70%69%62%57%55%66%79%84%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Monteriggioni

As September rolls into Monteriggioni, Italy, the UV Index showcases a return to high levels at 7, indicating a notable reduction in intensity compared to the peak summer months. With an estimated burn time of 25 minutes, it's important for sun-seekers to remain proactive about sun protection. This transition marks a shift from the intense UV exposure experienced in July and August, both at 9, to a more moderate yet still significant level. As autumn approaches, residents and visitors alike can bask in the milder sunshine while keeping an eye on sun safety. For detailed UV Index information throughout the year, check out Monteriggioni UV Index.

Maximum UV Index Levels in Monteriggioni for September

The chart shows the monthly maximum UV Index (UVI) for Monteriggioni in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec2467810997532
Data source: Monteriggioni September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Monteriggioni

As summer transitions to autumn in Monteriggioni, September boasts 338 hours of sunshine, a significant amount that still captures the warmth of the fading season. While this marks a decrease from the highs of July and August, it remains generous compared to the earlier months of the year. April and May lay the groundwork for brighter days, heralding a gradual increase in sunshine that peaks in the height of summer. Following the vibrant summer months, the slight dip in September heralds the onset of cooler days, yet the sunshine still lingers, inviting visitors to explore the charming medieval streets and stunning landscapes bathed in soft light. As the year progresses into October, the promise of clear skies continues, albeit with a dwindling count, offering a gentle reminder of the beauty that accompanies the change of seasons.

Monthly Sunshine Duration in Monteriggioni: September Highlighted

The September sunshine duration represents the total number of hours Monteriggioni experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec183h228h311h342h380h419h432h401h338h302h223h214h
Data source: Monteriggioni September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Monteriggioni During September

As September rolls into Monteriggioni, Italy, the likelihood of sunny weather remains quite favorable, with a 55% chance of sunshine. This mid-autumn month benefits from a decline in summer heat while still enjoying a generous amount of sunlight. Interestingly, September follows the peak summer months of July and August, which boast higher probabilities of sun at 63% and 66%, respectively. Although the cloud cover and cooler temperatures may gradually increase as autumn approaches, September maintains a significant opportunity for visitors to enjoy outdoor activities and bask in the golden Tuscan sunlight. This blend of comforting warmth and picturesque landscapes makes it an appealing time to explore the charming beauty of Monteriggioni.

Percentage of Sunny Days in September in Monteriggioni

The chart illustrates the percentage of sunny days in Monteriggioni throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Monteriggioni experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec30%43%64%46%43%58%63%66%55%43%34%38%
Data source: Monteriggioni September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Monteriggioni in September

As September settles in Monteriggioni, Italy, the days begin to take on a softer glow, with daylight lasting approximately 12 hours. This marks a gentle transition from the peak of summer, where daylight reached a vibrant 15 hours in June and July, gradually tapering off. The shift in daylight reflects the changing seasons, as the sun starts setting earlier, inviting cooler evenings and hinting at the approaching autumn. Following a month of 13 hours in August, September’s daylight provides a balanced yet moderate atmosphere, perfect for enjoying the warm hues of early fall while embracing the slower pace that this beautiful Italian town offers.

Average Daylight Hours in Monteriggioni for September

The chart illustrates the variation in daylight duration in Monteriggioni throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 21m10h 30m11h 57m13h 26m14h 42m15h 20m15h13h 53m12h 27m10h 58m9h 40m9h
Data source: Monteriggioni daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Monteriggioni

As September arrives in Monteriggioni, the winds whisper a gentle lull, with an average speed of 1.8 m/s (4 mph). This slight decline from the summer months reflects a transition into the softer autumn breezes that grace the landscape. While May and January boast higher gusts at 2.5 m/s (6 mph), September stands out for its calming presence, ushering in a more tranquil vibe. This shift in wind patterns not only marks the changing of the season but also enhances the charming atmosphere of the medieval town, inviting visitors to indulge in leisurely strolls amidst its picturesque surroundings. As the days grow shorter, the mellow September winds act as a reminder that nature is gently preparing for the cooler months ahead.

Average September Wind Speed in Monteriggioni

The chart displays monthly wind speed patterns in Monteriggioni, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.52.22.22.32.51.72.12.01.8 m/s2.42.31.9
Data source: Monteriggioni September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Monteriggioni Compares to Other Months

The weather in Monteriggioni changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Monteriggioni and find detailed weather information for every month.

September and January present stark contrasts in weather. September boasts a comfortable average temperature of 20°C (69°F), with highs reaching up to 32°C (89°F), while January's average plummets to just 5°C (41°F), peaking at 15°C (60°F). In terms of precipitation, September experiences 91 mm (3.6 in) over 9 days, compared to January's lighter 51 mm (2.0 in) across 7 days. Humidity levels also differ significantly, with September at 66% and January rising to 84%, contributing to a chillier feel during the winter month. For more detailed insights into January's weather, you can visit Monteriggioni weather in January.

September and February present vastly different weather experiences. In September, temperatures range from a pleasant minimum of 7°C (45°F) to a highs of 32°C (89°F), with an average of 20°C (69°F), making it a warm month with relatively higher humidity at 66%. In contrast, February is much cooler, with temperatures dipping to a minimum of -5°C (24°F) and maxing out at 20°C (68°F), averaging only 7°C (46°F). February also sees a higher humidity level of 76% and slightly lower precipitation at 78 mm (3.1 in), but it shares a similar number of rainy days with September at 9. For more details on the February weather, visit Monteriggioni weather in February.

September and March present stark contrasts in weather. In September, temperatures range from a mild 7°C (45°F) at night to a warm peak of 32°C (89°F) during the day, with an average of 20°C (69°F). However, it also sees considerable precipitation with 91 mm (3.6 in) over nine days, accompanied by a humidity level of 66%. In contrast, March experiences much cooler conditions, starting with a minimum of -12°C (11°F) and climbing to a maximum of 23°C (74°F), providing an average temperature of 9°C (49°F). Although there is slightly less precipitation at 66 mm (2.6 in) over the same number of days, the humidity remains relatively high at 68%. For further details on March weather, you can refer to Monteriggioni weather in March.

September and April present contrasting weather patterns as summer transitions to autumn. September enjoys warmer temperatures, with averages around 20°C (69°F) and maximums reaching 32°C (89°F), while April is much cooler, averaging only 12°C (55°F) and peaking at 26°C (78°F). Precipitation levels are relatively similar, with September receiving 91 mm (3.6 in) over 9 days, compared to April's 81 mm (3.2 in) over 10 days. Humidity is slightly higher in April at 70%, compared to 66% in September, making the spring month feel a bit damper. For a closer look at April's weather specifics, you can check out Monteriggioni weather in April.

In comparing the weather conditions of September and May, we notice several distinctions. September experiences a broader temperature range, with minimums of 7°C (45°F) and maximums reaching 32°C (89°F), while May is slightly cooler, featuring minimums of 3°C (38°F) and maximums up to 31°C (88°F). Both months share the same total precipitation of 91 mm (3.6 in), but September has fewer rainy days (9) compared to May's 14 days. Humidity levels are relatively similar, with September averaging 66% and May slightly higher at 69%. For more insights specific to May's weather patterns, you can visit Monteriggioni weather in May.

In comparing the weather between September and June, September exhibits a broader temperature range, with minimums dipping to 7°C (45°F) and maximums reaching 32°C (89°F). The average temperature stands at 20°C (69°F), slightly lower than June's average of 22°C (71°F), which features a higher maximum temperature of 35°C (95°F). Furthermore, June experiences less precipitation, with 43 mm (1.7 in) over 6 days compared to September's 91 mm (3.6 in) over 9 days. Humidity levels are fairly similar, with September at 66% and June at 62%. For more detailed insights, you can check Monteriggioni weather in June.

When comparing the weather in September to that of July, notable differences emerge. September experiences a broader temperature range, with minimums dropping to 7°C (45°F) and maximums reaching 32°C (89°F), while the average temperature is around 20°C (69°F). In contrast, July boasts a warmer climate, with minimums at 13°C (56°F) and maximums soaring to 36°C (97°F), averaging 24°C (76°F). Moreover, September sees more rainfall, accumulating 91 mm (3.6 in) over about 9 days, compared to July's lighter precipitation of 41 mm (1.6 in) over just 5 days. Humidity levels are also higher in September at 66%, compared to July's 57%. For further details, you can check out Monteriggioni weather in July.

In comparing the weather of September to August, September offers a milder experience with minimum temperatures dropping to 7°C (45°F) and an average of 20°C (69°F), while August sees warmer lows at 12°C (53°F) and an average high of 25°C (77°F). Notably, September also features higher maximum temperatures of up to 32°C (89°F), compared to August’s peak of 37°C (98°F). Additionally, September experiences significantly more precipitation, totaling 91 mm (3.6 in) over 9 days, contrasting with August’s 36 mm (1.4 in) over just 5 days, and a higher humidity level of 66% compared to 55% in August. For more specifics on August's weather, check out Monteriggioni weather in August.

September typically showcases milder weather with an average temperature of 20°C (69°F) and can reach highs of 32°C (89°F), while it's still possible to experience some warm days. The month also sees a total precipitation of 91 mm (3.6 in) spread over 9 days. In contrast, October brings cooler temperatures, averaging 15°C (59°F) with maximums around 27°C (80°F) and minimums dropping to 4°C (39°F). The precipitation levels remain similar at 88 mm (3.5 in) over 8 days, but the humidity rises significantly to 79%, making the air feel more damp. For a detailed look at October's weather specifics, check out Monteriggioni weather in October.

In September, temperatures range from a pleasant 7°C (45°F) at night to a warm average of 20°C (69°F) during the day, peaking at a maximum of 32°C (89°F). This month also sees lower precipitation levels at 91 mm (3.6 in) over about 9 days, with a humidity level of 66%. In contrast, November experiences much cooler weather, with nighttime temperatures dropping to -3°C (27°F) and a daytime average of 11°C (51°F), reaching a maximum of 19°C (66°F). Rainfall increases notably to 141 mm (5.5 in) over 14 days, and the humidity rises significantly to 84%. For more detailed weather insights, you can check Monteriggioni weather in November.

September and December present dramatically different weather conditions. In September, temperatures can range from a pleasant minimum of 7°C (45°F) to a warm maximum of 32°C (89°F), with an average of around 20°C (69°F). This month experiences moderate rainfall, totaling 91 mm (3.6 in) over about 9 days and a humidity level of 66%. Conversely, December brings a significant drop in temperatures, with a minimum of -4°C (26°F) and a maximum of only 16°C (61°F), resulting in a chilly average of 7°C (44°F). Precipitation increases to 111 mm (4.4 in) across 14 days, along with higher humidity at 83%. For more details about December weather, you can refer to Monteriggioni weather in December.

Compare Monteriggioni's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Monteriggioni

As September unfolds in Monteriggioni, it offers a unique blend of summer warmth and the gentle embrace of autumn. While temperatures can still reach a maximum of 32°C during the day, the average provides a pleasant 20°C, making it a striking contrast to the sweltering heat of the peak summer months. As the month progresses, the increased precipitation, averaging 91 mm over 9 days, brings refreshing rainfall, contributing to a lush landscape, perfect for exploration. With humidity sitting comfortably at 66%, the weather feels invigorating yet not oppressive. This transitional month sets the stage for arguably one of the most beautiful times to experience Monteriggioni’s charm and scenic beauty. For a deeper dive into what to expect year-round, check out the detailed insights on Monteriggioni Climate.